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Workreport 1998-10

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Name:

Geofysikaaliset reikämittaukset Loviisan Hästholmenilla 1997, kairanreikä KR4

Writer:

Arto Julkunen; Leena Kallio; Pertti Hassinen

Language:

Finnish

Page count:

43

Summary:

Working report: ABSTRACT





GEOPHYSICAL BORE HOLE LOGGING IN HÄSTHOLMEN, LOVIISA, 1997,
BOREHOLES KR4

The Finnish power companies TVO and IVO prepare for final disposal of nuclear
fuel into the Finnish bedrock. The site investigations are carried out by Posiva Oy
since 1996. Preliminary investigations took place during 1987 - 1992 at five sites.
The programme continues as detailed investigations in three sites, Romuvaara in
Kuhmo, Kivetty in Äänekoski and Olkiluoto in Eurajoki which were selected for
detailed investigations to be carried out during years 1993 - 2000. Hästholmen
(Loviisa) was taken under investigations 1997. The site will be selected in 2000.

The aim of the detailed investigation phases is to increase the knowledge of the
bedrock on the areas and to complement the investigations made earlier. As a part
of the detailed investigations Astrock Oy carried out geophysical borehole logging
in Hästholmen (Loviisa) in autumn 1997. This report will describe the logging at
Hästholmen site, borehole KR4, and the results.

The commission included geophysical borehole logging. Logging were carried out
using the following methods:
- fluid resistivity
- fluid temperature
- short normal-resistivity
- single point-resistance
- magnetic susceptibility
- natural gamma
- gamma-gamma-density
- caliper
- sonic.

In addition to the logging the commission included data presentation and
reporting.

Keywords: geophysics, bore hole logging, resistivity, gamma radiation, caliper,
sonic-logging, ground water, Astrock Oy



ABSTRACT





GEOPHYSICAL BORE HOLE LOGGING IN HÄSTHOLMEN, LOVIISA, 1997,
BOREHOLES KR4

The Finnish power companies TVO and IVO prepare for final disposal of nuclear
fuel into the Finnish bedrock. The site investigations are carried out by Posiva Oy
since 1996. Preliminary investigations took place during 1987 - 1992 at five sites.
The programme continues as detailed investigations in three sites, Romuvaara in
Kuhmo, Kivetty in Äänekoski and Olkiluoto in Eurajoki which were selected for
detailed investigations to be carried out during years 1993 - 2000. Hästholmen
(Loviisa) was taken under investigations 1997. The site will be selected in 2000.

The aim of the detailed investigation phases is to increase the knowledge of the
bedrock on the areas and to complement the investigations made earlier. As a part
of the detailed investigations Astrock Oy carried out geophysical borehole logging
in Hästholmen (Loviisa) in autumn 1997. This report will describe the logging at
Hästholmen site, borehole KR4, and the results.

The commission included geophysical borehole logging. Logging were carried out
using the following methods:
- fluid resistivity
- fluid temperature
- short normal-resistivity
- single point-resistance
- magnetic susceptibility
- natural gamma
- gamma-gamma-density
- caliper
- sonic.

In addition to the logging the commission included data presentation and
reporting.

Keywords: geophysics, bore hole logging, resistivity, gamma radiation, caliper,
sonic-logging, ground water, Astrock Oy



Keywords:

Geofysiikka; reikäluotaus; ominaisvastus; gammasäteily; kaliiperi; sonicluotaus; kalliopohjavesi; Astrock Oy

File(s):

Geofysikaaliset reikämittaukset Loviisan Hästholmenilla 1997, kairanreikä KR4 (pdf) (1.2 MB)


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